The always-innovative mayor’s new project, The Caliber Collection, features utilitarian-chic bangles and cuffs made from the steel of 250 confiscated guns and brass of shell casings swept from the ground of crime scenes. Each piece has the weapon’s original serial number stamped into the hammered metal that wouldn’t look out of place on the arm of the Alexander Wang-wearing set.

The collection’s beauty is in its cyclicality: the pieces range in price from $150 to $375, and 20 percent of the funds raised support gun-buyback programs—the weapons purchased there, in turn, create more jewelry and more money for future buybacks. The collection has become an instant hit, raising $20,000 for Newark’s gun-buyback program in less than two months. The newly minted fashionista Booker called the line “very hot,” telling WBGO radio on Wednesday that “not only do they look good, they’re becoming very popular.”

Anyone who turns in a gun gets money, amnesty and the gun will then be destroyed and made into the jewelry in the future.

According to the designer:

“I’m taking the whole horrible scene and I’m transforming it and creating this virtuous circle and giving back to get those guns off the street so that scene can’t occur again,” she says. “You wear it as much more than jewelry—you wear it as a symbol of solidarity with the important cause that you’re reducing illegal gun violence in America.”